程潮铁矿深部开采岩爆预测

ROCKBURST PREDICTION OF CHENGCHAO IRON MINE DURING DEEP MINING

程潮铁矿经过近40a的开采,已初步进入深度开采阶段。为预测岩爆发生可能性及其烈度,对程潮铁矿深度-430～-700m的部位多种岩样进行岩石力学试验,提出岩爆倾向性的多种判据。通过理论预测法分别对各种岩样的倾向性及烈度进行预测,得到程潮铁矿围岩的岩爆倾向性顺序,总结出可能强度较高的几种岩石类型及其所在深度;最后结合模糊数学综合预测法,针对已有多种指标进行岩爆倾向的综合评价,得到矿区总体岩爆倾向性及岩爆临界深度,为矿区开采设计和岩爆监测预报提供了依据。

After 40 years′ mining in Chengchao iron mine,now it is coming into deep mining. To predict the possibility and intensity of rockburst,the author obtained rocks from the depth underground -430 to -700 m. Based on systematical mechanical experiments of rocks,various prediction criteria for rockburst are brought forward through many testing methods. With the theoretical methods,rocks which have the different possible intensities for rockburst are checked up by the criteria,and some types of rocks in the mine which has high possibility and severe intensity are confirmed. At last,combined with the comprehensive prediction methods in fuzzy mathematics,synthesized prediction upon those criteria is made that the orientation of rockburst and critical depth are ascertained in the mass,which can be the basic theory in the mining design and rockburst prediction.